Scientific evidence suggests that cumulative GHG emissions have already caused climate change, which tolled victims all over the world but quite often charged disproportionally high costs to poor segment of the world, and substantial mitigation actions are needed to avoid irreversible catastrophic change in ecosystems that underpin very human survival. As a group of world leading countries, G20 is expected not only to pioneer ambitious actions for transition to low-carbon or decarbonized society but also to lead international cooperation in capacity development of less developed countries for implementing ambitious actions and in financing such actions.

Scientific evidence suggests that cumulative GHG emissions have already caused climate change, which tolled victims all over the world but quite often charged disproportionally high costs to poor segment of the world, and substantial mitigation actions are needed to avoid irreversible catastrophic change in ecosystems that underpin very human survival. As a group of world leading countries, G20 is expected not only to pioneer ambitious actions for transition to low-carbon or decarbonized society but also to lead international cooperation in capacity development of less developed countries for implementing ambitious actions and in financing such actions.